HP 6125G HP 6125G & 6125G/XG Blade Switches IP Multicast Configuration - Page 311
Configuration prerequisites, Enabling IPv6 PIM-DM, Enabling state-refresh capability
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Configuration prerequisites Before you configure IPv6 PIM-DM, complete the following tasks: • Enable IPv6 forwarding and configure an IPv6 unicast routing protocol so that all devices in the domain are interoperable at the network layer. • Determine the interval between state refresh messages. • Determine the minimum time to wait before receiving a new refresh message. • Determine the hop limit value of state-refresh messages. • Determine the graft retry period. Enabling IPv6 PIM-DM With IPv6 PIM-DM enabled, a router sends hello messages periodically to discover IPv6 PIM neighbors and processes messages from the IPv6 PIM neighbors. When you deploy an IPv6 PIM-DM domain, enable IPv6 PIM-DM on all non-border interfaces of routers. IMPORTANT: • All the interfaces of the same device must operate in the same IPv6 PIM mode. • IPv6 PIM-DM cannot be used for IPv6 multicast groups in the IPv6 SSM group range. To enable IPv6 PIM-DM: Step Command 1. Enter system view. system-view 2. Enable IPv6 multicast routing. multicast ipv6 routing-enable 3. Enter interface view. interface interface-type interface-number 4. Enable IPv6 PIM-DM. pim ipv6 dm Remarks N/A Disabled by default. N/A Disabled by default. Enabling state-refresh capability Pruned interfaces resume multicast forwarding when the pruned state times out. To prevent this, the router directly connected with the IPv6 multicast source periodically sends an (S, G) state-refresh message, which is forwarded hop by hop along the initial flooding path of the IPv6 PIM-DM domain, to refresh the prune timer state of all the routers on the path. A multi-access subnet can have the state-refresh capability only if the state-refresh capability is enabled on all IPv6 PIM routers on the subnet. To enable the state-refresh capability: Step 1. Enter system view. 2. Enter interface view. 3. Enable the state-refresh capability. Command system-view interface interface-type interface-number pim ipv6 state-refresh-capable Remarks N/A N/A Optional. Enabled by default. 300
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